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1999 Daihatsu Sirion Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Daihatsu Sirion wheels? This page gives the 1999 Daihatsu Sirion bolt pattern (4x100), centre bore, factory rim size and the offset range for aftermarket and forged Daihatsu Sirion rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 1999 Daihatsu Sirion uses a 4x100 bolt pattern with a 54.1 mm centre bore and M12x1.5 lug nuts. Factory wheels: 14x5.0J, front and rear. For aftermarket wheels, 15x6.0J ET32 sits flush and 16x6.5J ET30 is the most aggressive fit.
Forged wheels for the 1999 Daihatsu Sirion — drilled 4x100 with a 54.1 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Daihatsu Sirion (1999): 4x100 bolt pattern, 54.1mm center bore. Factory wheels: 14x5.0J F/R. Reference fitment ranges.
Bolt Pattern4x100
Wheel Bolt/NutM12x1.5 Nut
Center Bore54.1mm
Wheel Load Rating650–750 kg/wheel (Standard Passenger Car segment reference)
Year1999
CategoryHatchback
✓ Data check: the bolt pattern and center bore on this page match an independent fitment reference. Last reviewed September 18, 2026. How we verify
Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | 14x5.0J F/R |
| Flush Fitment | 15x6.0J at ET32 offset |
| Maximum Aggressive | 16x6.5J at ET30 offset |
Forged Wheel Designs for the Daihatsu Sirion
Every design below is forged to order, so it can be machined to the Daihatsu Sirion's 4x100 bolt pattern and 54.1 mm center bore, with the width and offset calculated for your setup.
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Rays-Style Gunmetal Mesh Polished Deep Lip Forged Wheels
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APEX-Style Matte Bronze 8 Y-Spoke Mesh Forged Wheels
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Black / Machined 4-Spoke Forged Wheels
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Silver Round-Hole Steelie-Style Forged Wheels
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APEX-Style Bright Silver 8 Twin-Spoke Mesh Forged Wheels
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How to Read Wheel Offset & Measurements
Use these two references before ordering: the left diagram shows where each spec (PCD, center bore, offset, width and diameter) is measured on the wheel; the right diagram shows how positive, zero and negative offset shift the wheel face relative to the hub centerline.
ANKUSI Engineering Expert Advice
On a compact performance platform, every pound of rotational mass fights the car's natural agility. A forged wheel keeps strength at the factory-rated level while cutting that rotational weight, which is where the driving-feel improvement actually comes from.
The Daihatsu Sirion runs a 4x100 bolt pattern, 54.1mm center bore, and a 14x5.0J, front and rear, wheel from the factory. Our Flush Fitment reference is 15x6.0J ET32, which tucks the tire under the fender lip on a stock-height Daihatsu Sirion. Our Maximum Aggressive reference is 16x6.5J ET30 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Daihatsu Sirion OE Wheel Specs
The 1999 Daihatsu Sirion (Hatchback) uses a 4x100 bolt pattern with a 54.1mm center bore. Factory wheels are 14x5.0J F/R.
Why the factory spec works for most owners:
- Keeps the factory ride quality and noise levels intact
- A common fitment for this class, so replacement tires are easy to source
- Preserves clearance around the OE brakes and suspension geometry
- Delivers predictable, easy-to-live-with handling for daily use
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Daihatsu Sirion (1999) we drill the 4x100 pattern and cut the centre bore to 54.1mm on our own CNC line, so the wheel hub-centres on the car with no spacer rings, in whatever diameter, width and offset you specify.
Converting these ET figures to backspacing? Use the wheel offset and backspacing calculator.
The figures on this page are part of our open wheel fitment dataset — 10,093 vehicles, free to download, CC BY 4.0.
Offset & Backspacing Reference
Backspacing is calculated as wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance):
- OE: 14x5.0J ET38 → ~4.5″ backspacing
- Flush: 15x6.0J ET32 → ~4.76″ backspacing
- Max: 16x6.5J ET30 → ~4.93″ backspacing
Want to check a different width or offset before you order? Use our Offset & Backspacing Calculator to solve the numbers yourself, or looking for your exact Daihatsu spec, or want a wheel built to a custom offset for your Daihatsu Sirion? Contact ANKUSI with your bolt pattern and offset target and we will confirm the correct forged wheel spec for your build.
Daihatsu Sirion: Specs by Model Year
| Year | Bolt pattern | Center bore | Factory wheel |
|---|---|---|---|
| 1999 | 4x100 | 54.1 mm | 14x5J |
| 2007 | 4x100 | 54.1 mm | 14x5J |
Bolt pattern and center bore stay the same across all 2 model years in our database (1999–2007).
Vehicles With the Same Hub as the Daihatsu Sirion (4x100, 54.1 mm Bore)
In our database, 154 other vehicle entries from 23 makes use exactly the same 4x100 bolt pattern and 54.1 mm center bore. Factory wheels from these cars bolt on and center on the hub without rings; offset and width still have to be checked.
4x100 is used by 6.9% of the vehicle pages in our English fitment guide (451 of 6,503); 34.4% of those also use a 54.1 mm center bore.
Hub-Centric Rings for a 54.1 mm Center Bore
A wheel with a center bore larger than 54.1 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 56.1 mm | 56.1 → 54.1 mm |
| 57.1 mm | 57.1 → 54.1 mm |
| 60.1 mm | 60.1 → 54.1 mm |
| 63.4 mm | 63.4 → 54.1 mm |
| 73.1 mm | 73.1 → 54.1 mm |
ANKUSI forged wheels are bored to exactly 54.1 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Daihatsu Sirion use?
The 1999 Daihatsu Sirion uses a 4x100 bolt pattern.
How many lug bolts does the Daihatsu Sirion use?
The Daihatsu Sirion uses a 4-lug bolt pattern (4x100), so you need a 4-lug forged wheel to bolt straight on.
What is the center bore size on the Daihatsu Sirion?
The Daihatsu Sirion's center bore is 54.1mm. If an aftermarket wheel has a larger center bore than this, hub-centric rings are recommended so the wheel centers on the hub itself rather than relying on the lug bolts alone.
What size are the factory (stock) wheels on the Daihatsu Sirion?
Factory wheels on the Daihatsu Sirion are 14x5.0J F/R.
What is the biggest wheel size I can fit on my Daihatsu Sirion without rubbing?
The most aggressive fitment we recommend without fender work is 16x6.5J at ET30 offset. Going beyond this typically causes rubbing under compression unless you roll the fenders or add camber correction.
What does a flush wheel fitment look like on the Daihatsu Sirion?
For a flush look with minimal to no rubbing, we recommend 15x6.0J at ET32 offset as a starting point on a stock or mildly lowered Daihatsu Sirion.
Do I need wheel spacers for my Daihatsu Sirion?
No. ANKUSI forges each wheel to your exact target offset, including the flush or max specs above, so you get the correct fitment without stacking spacers. Spacers are typically only used to push out an existing OE-offset wheel without replacing it, which isn't necessary when you're ordering a custom-offset forged wheel.
How do I calculate wheel backspacing for my Daihatsu Sirion?
Backspacing (in inches) = wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance). For example, the flush spec above works out to roughly 4.76" of backspacing.
What's the difference between wheel offset and backspacing?
Offset is the distance in millimeters from the wheel's true centerline to its mounting face (positive offset pulls the wheel in, negative pushes it out). Backspacing is the distance in inches from the mounting face to the back edge of the wheel barrel. They describe the same fitment from two different reference points, which is why ANKUSI lists both above — some shops and tuning guides quote offset, others quote backspacing.
Can I run staggered wheels (different sizes front and rear) on my Daihatsu Sirion?
The Daihatsu Sirion runs the same wheel size front and rear from the factory, so staggered fitment is not required. ANKUSI can still forge a staggered set (wider rear) on request if you want a more aggressive stance.
Sources and Last Update
Data checked against: avtoreference.com.
This record is part of the open ANKUSI Wheel Fitment Dataset (DOI 10.5281/zenodo.23241521, CC BY 4.0).
Other cars on the same factory size: 14x5 wheels · 14 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.